It is sometimes argued that news reports in the media suffer from biased reporting. Mullainathan and Shleifer (2002) argue that there are two types of media bias. One bias, called ideology, reflects a news outlets̕ desire to affect reader opinions in a particular direction. The second bias,...

It is sometimes argued that news reports in the media suffer from biased reporting. Mullainathan and Shleifer (2002) argue that there are two types of media bias. One bias, called ideology, reflects a news outlet's desire to affect reader opinions in a particular direction. The second bias,...

We introduce a novel method for training computer algorithms to measure news sentiment. Our approach leverages human-coded sentiment scores from over 200,000 newspaper articles to teach the computer to select words, word combinations, and their linear weights. In an out-of-sample test, examining...